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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7a0d2248d9568eb781e3145db9181afb9d37c7cd1a6a8b311bbc5db166fcc6fd' 
  AND token = 'zyuN70BUEEjsZTyrkHdaTo7FSeb0C7BB9wGp2/gsbpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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