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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '202496c655e0bff90cc3324e8bbdbc8684c31aed1e524ff1293628c204da1152' 
  AND token = 'Am3iZvnCg5CBIfmRGZ26HEjEOUsx4U3Mc1IgeY9Q+W0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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