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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '42cb85d70df913a4bc84e80c68939ddc3616ae3b47854d76714ef1d20ee63174' 
  AND token = 'kVC7l8t166M67TQ2ekkl5cT9M5tPqHzvtohxymA3epA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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