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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'af72e4bee29417dc709d386ce39d6479807a502e5dfd10041e4939221f22b4d4' 
  AND token = 'HlcXZxNe7EYXqhvHFJ9brJkgyPWnc14xg1GGnfDUb5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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