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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72db4a07c746d76c739c9fad63992d5225076102d6319929ec7193c9a4c00290' 
  AND token = 'IBLAZMCXvGBNY0ZjkNBxIj0eFyOyR0ATaFEkI9ak+CQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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