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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a758ecabf45c69ae56f2ccd32e38bacc21b56a8ffae6035c8efc563a6d3a3ff' 
  AND token = 'AurBG5JKBxTLGkF78PPxhT0ettA++TpcIkqiDW2ILP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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