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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'cf1c5e31340e735f642f2b1d851de3d4f1db07a759639dbef628519ef98f9894' 
  AND token = 'RELTEV/nCQa7fy2hDJ+0EfQPLl2gZG/Dt4RDCSdfXWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}