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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '468296cacd907e936cdad52ac6b7df61325cf7543fe44d5c7d65c0fe76a2ff04' 
  AND token = 'z7/E1WGLraKFWjPM5vPmTmIqB/qtvse3mO8L92EbDa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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