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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd097c9319a890e4c7a53c13634cd2cb8293ba6c6597e6c3607d73d877b4d8d8e' 
  AND token = 'Qpk4mf/jfv15J+t1es675kHYIHeghBxMVl++ZlMC5HQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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