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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01654340bb1cc0768f5292c921c8fcc5826248bbd7e3ebd56fe9fb3a87e0573e' 
  AND token = 'y9GIDmkhpw+om33MYdjGkDjDa2iVna+23RxqJy8+1Do=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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