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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b0554429fc90f51b6c18660dd4d68d450a6d41782f93a10b6cc1c577519ab1b' 
  AND token = '9j9R9XdFh6hai+Ik77xlF6yPmZbl0UAbA4l0nK8G4Ng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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