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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32aaa2e2b14005bfdb37f1bc4822ebd59604be15cc80e8c7aa46015d4c16b434' 
  AND token = 'RsJgQea9/giqtOOjHWX6rgkVzL0Cf6BNorG3Y9rzaOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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