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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cd69329a99b2ace178e6b06c9ffb6de5e6fc06d8bfaf78a0091ae6ef383f700d' 
  AND token = '4qvA3NkkbCeS82nGxDuSC55kD5HEsnjnxHcDSIoqbsQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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