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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce5064d42a3bb5e4d70eb9d8a7b0aef7c0ec6bb1c0156008a1ef377d4cba7968' 
  AND token = 'l88uBhmw+pbeSa9Ko6Gb1ztbqrA7ePUQx7699S8/PXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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