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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4417dcdf4bc6a07ac5afbd935a2d0a80b1dbd8dd37282b25ce78346acd14c271' 
  AND token = 'w5BW5A4/RWArXEtSRduyIf6MmTgcqsueWPeJ5rykG+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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