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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13ac7af196908459b659aaae0709d03f3d17e568ac36ad61cbe32bbae2de57a1' 
  AND token = 'BOoMr130yYPz5yvSZC7VGvW1oQCeje7supdV7xASCOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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