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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09fe10ff19310272dafa89cfd4703cf9abe5ba30feb0732206f4339018f215cb' 
  AND token = 'WPidL3A7QydSnGfW6OO3GOKKM8U1pQ0Oc2S2TGy1MNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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