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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8b3aba89f9f2a254608b35744d665f6e8ce8cd183e7ca6008a80eae450495893' 
  AND token = 'YKGesm64CPqOQ6rU1d6e5J0p9T8m82Umly/ATiuuMjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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