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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb2b05a59a8d81fc35e86a578ba917bf3033f3a5ccf28e806b23b3a02f2d8d54' 
  AND token = 'Pws0q4x6TnFblIjO6CnRFLa83ZQQtPeOrxJblQ7RpCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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