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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afeede49d5b0209394ed89c23688221370463ffe162b6bef1a178ea626525795' 
  AND token = 'jEYqsxkzzre7XV002l6WiGfzhkqXXeRWzLtoJyH18V0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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