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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d559dc2cb5b01e863921f3d823b2b9693e658a97725071e815436f32d68055c' 
  AND token = 'I0nB7APplm216xjtmdY+e80w/2kuYxJ97tyrlaVO7I0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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