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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd48a88d221c42f9b6b943e6d6c1facfdf09a2d3eb053b1e81a5ed46c68882442' 
  AND token = 'H1Lrh5mW2ucOiQn2GCWirPQsTgbp6fnklcHE078oznU=' 
  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"
    }
  }
}