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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee803e429f7a219f67e44818db53762abce3fce11364194de5f38c6fb0fd180e' 
  AND token = 'Pe6HgoV9132ZfrZtgip7sd9Pjuc6IS5sVesxfzTFk0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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