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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '387d1eec66e510bad675f2a3460f012fc6c0dbade7145a8cb9cc74dc7eba0f7b' 
  AND token = 'AipisPouPTCpZCb5Q7rhYf6YbtrA6bqP8Vua1tym5Qk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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