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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ceacb06ee5f238943d765fdd40d9da711f920dd4213916fdf2edbeb54bff2c37' 
  AND token = '0NbVqQ7+Cwz9FqYUQ3dZKourfRFJ44f06Ry9RkQzJMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00082

JSON explain

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