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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ee3e8abbfc8ef5f5483f7292d0f89873000b3c60d87e8e85413e83a58cb7381' 
  AND token = 'vmKG1edUxCnLYEjXFHfhwTnobWXLnNa63w5Ii7CX+1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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