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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f3f0433b794d76de2ccb7bbea5cc859172ccb17bd61c14c9901ae4f9bdec675' 
  AND token = '8g4pbsaX4gv4t88mw+iBjaV0fajxoSQi/qgIXtN2dQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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