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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80c395cead0f0a3570687706bf4e6d2309aa29073cb590b10ccc4a8846a9ed42' 
  AND token = 'ofDrgIlXtrE3RsWp7yybf20HbYQ75/3Q9i8ZPt1RKE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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