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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17cdcbd9799c79ae0ddb14f391154eacb5b81342e4173e0e518fb486f483960d' 
  AND token = 'ASepgBtTqsEMk8JzYaNk1ntdKSdBJOAs12Q7zimUx/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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