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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a89be25f8f2d1c06bab907d91f25ddc537c79e9a10e87458a59a547acb40980' 
  AND token = 'eCCGOAAzD1m49c8yfeEc0ZP0GEvS+ezs1AWGQ4WSXxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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