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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1944998c850c895be442a1cee8327a17bb95a4bcd65afbcc18b7d2995080ddb6' 
  AND token = 'cyOMMwH0Ilxeg5Dg5jo42q12Wn2ro2crkisyMyqMP44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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