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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b3dd0ae7a45a5a3b93c1a5f9df112d3b548d323b58e6802443b4b9a9f62ea5e2' 
  AND token = 'XO5xk/iHbEkUNyp92RaJ77pzkOrkAbUmMD3cDZlyfO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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