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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ceba879baad3777d5a22f3d08655fb1191099f652631ec62de495f45f28f5407' 
  AND token = '9BEhm7fvKTx7X2odDNQYigM9J3dxiUJWF4ByPBIOQjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}