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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '132ffd05927f34472b829afb9eff9d2985170be75dc7a810ab935a4e84e16edb' 
  AND token = '1SpLdwJ8B5ep+BO+DC7X90tDicK4yJZA6y0lcGWPiwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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