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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1c700ea5568e6b7f4981d0d50693295798ce9371ca04bfe8262b94aaad92840' 
  AND token = 'ezZ0xuibNp9egfI2tR+Z/+bp30Nvu4ueNDynVluatFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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