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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5287e873a3b5276ef289efd5b0b1de0149227d139659b02782208c7090635408' 
  AND token = 'p86/7B8b/5H6PtaNpoWyvzLloDRGHo4V+cL9Vk6aZz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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