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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0632cdebdffa4965cff6076bf9ddd459cc3bb768fe2f44236611f7fb708021d6' 
  AND token = 'OdspQywSOkalM6ZY9v3rwHtTWnkAOgp7w5tJYhdv6eg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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