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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da82aaf7cd6d422a6cc8f9e0e7398c11b9da133277db7bb5bea412493f0f6593' 
  AND token = 'nedwwmYMtuST7IbAkRg20B2vPzdw7cPNvID723cIE70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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