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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7930060ce560a29189648f0c5eac57ba35161a966a736a499fc1c734cb028580' 
  AND token = 'ifB+Q85jWzqg5jBVL+TQNIBbS97Oqab4xRmNrzERvXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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