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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8d69e94b2573beebc1969f3e0e48140c170390040186cb49a84e930b4a9fd95b' 
  AND token = 'Ny0DQaf0opsvNgJ7DqZl4NpgDvDdNGLzFP3qQJw/qts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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