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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '25cd755b2d4f94babeee89d82afcecb67a895581f01396aa35cb2a0cd40d4059' 
  AND token = 'cVTbqN/sjPrUKsds4c3tE3DMy5y5jZtkssJLoyR4Wxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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