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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eba64541dc123d507f094157f1d377aa495c59d34cb129a2f5b895f2bd4c8aa5' 
  AND token = 'P51x33spLaWOpz2fCmO16H4ps2iB0CgjGYJyNLangEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}