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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '588e9b5737ebcaa15e49115d861c6d0f7e73ee7c786b0d116a0427d21dfdb9f5' 
  AND token = 'haGEb2tq9vt6dPvOErRjo1rFWOKQXMtsTJJT2ZSh2us=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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