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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60c9f419693584c9f0ff74dc58e856a2d024868221144f68fbde0587fce07076' 
  AND token = 'njgY2YXCAZ/TlwBAoBIn2r4p4dHBcIEOlkCUa0T0I7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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