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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '241713360d783fee74d10daa5b70b4993b8139180e243443b9051d765c97ca76' 
  AND token = 'cHJyM2Tm7OJQ+P8wxLB1bA6F9NGx015coY0SIXuCAYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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