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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd1c4d3c88f82ed4c1fff35116178a0905551ac3bc84808ab560d6559a6d69c4' 
  AND token = 'vV6YjfDoCHbBht1q1gj1u09A30+HZsIp7iC3Vc5YzKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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