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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '43a6dd7b69dc962312d1c42bb51f23c3f63444ba159329eb544759617b4dee54' 
  AND token = 'LT1BksvvD/W9ty5e3Uxagw581GAG6SZcsMvYMfLpJmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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