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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '095f3d114c533e08267d964b5edb44eddfd870be4545a26806e2abb121923424' 
  AND token = '9cY5S/fNwz9Gw0OBljNYnXONPhB5p05H0sTg1dspLmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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