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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '58e32594b48d13d75ba4e05339c6a5bb75731d38d8418a7dadbc6aa909dd4f97' 
  AND token = 'Vmf3jjoZAZ3MVakH2D4G/RtDJCAk+9+A6dpwQt9U+jw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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