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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1ddcd5189b2579d94e3b5a76fd8f30c7f86991d3873edac1bf348a4a88b4a24' 
  AND token = 'ifqHCaraXFf291u0Val/T/APUVfrFvAdSyWtgTkd79c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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