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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '96adb44096e804e09f2a33e7782550b461a4c9def3a3a61ac7eb2a5de1b4fbc5' 
  AND token = 'o7iVFpYhX1H3uNvk4cLfkMVf9ElF5lNYfbP2ROVFeSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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