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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '352cdf2080ae7f3d431ced8006ef193c94b22976c460b5095e81472a1e0be439' 
  AND token = '/oxiv8zqysNLkkQ/bchEw81oGAR8vCs49Fupyfnw4YY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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